Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/37672
Título: Effect of concentration and temperature on the thermal conductivity of frozen acerola pulp
Título(s) alternativo(s): Efeito da concentração e temperatura sobre a condutividade térmica da polpa de acerola congelada
Palavras-chave: Polpa congelada de acerola
Condutividade térmica
Sonda de fio quente
Frozen acerola pulp
Thermal conductivity
Hot wire probe
Data do documento: Jan-2015
Editor: Universidade Estadual Paulista
Citação: PEREIRA, C. G.; GIAROLA, T. M. de O.; ELIAS, H. H. de S.; RESENDE, J. V. Effect of concentration and temperature on the thermal conductivity of frozen acerola pulp. Semina: Ciências Agrárias, Londrina, v. 36, n. 1, p. 187-202, jan./fev. 2015.
Resumo: The purpose of this work was the experimental determination of the thermal conductivity of acerola pulp at concentrations of 5.5, 7.5, 9.5, 11.5 and 13.5 °Brix and temperatures of 0, –5, –10, –15, –20, –25 and –30 °C. The methodology used involved a hot wire probe, and the experimental results were compared with values estimated by several theoretical models (series, parallel and Maxwell-Eucken models) to evaluate the error involved. We observed an influence both of the concentration and the temperature on the thermal conductivity of the pulp. An increase of the conductivity with a decrease in temperature and in the solids concentration was detected. We observed the greatest increases in the range of 0 to –10 °C. Linear and polynomial equations were adjusted for the direct determination of the thermal conductivity of the pulp in the range of temperature and concentration studied.
URI: http://repositorio.ufla.br/jspui/handle/1/37672
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